Author Topic: Lg 37lg3000 No Picture / No Sound (Read 5746 times)

EVILMRB · « **on:** October 07, 2015,16:46:24 »

Hi I have a Lg 37lg3000 TV Which when you press the On/Off button the stand-by light flashes three times then the back-light comes on with no picture or sound.Can any body help me with this set please.

I have uploaded a picture of the PSU and the Av Board...If this helps

Mulja tv repair portal · « **on:** October 07, 2015,16:46:24 »

jordan · « **Reply #1 on:** October 08, 2015,02:35:01 »

On main board check IC1102 for dry joints

EVILMRB · « **Reply #2 on:** October 08, 2015,18:27:25 »

Thank you I will have a look at that and get back to you.

Mulja tv repair portal · « **Reply #2 on:** October 08, 2015,18:27:25 »

jordan · « **Reply #3 on:** October 09, 2015,03:24:54 »

Error code 3
Replace IC105 (memory) 24C512
No 24V at inverter board-replace two FETs on inverter board

EVILMRB · « **Reply #4 on:** October 09, 2015,09:57:24 »

Invertor working fine.

EVILMRB · « **Reply #5 on:** October 09, 2015,16:55:42 »

Would it be worth buying a new main board because I can get one cheap.

Mulja tv repair portal · « **Reply #5 on:** October 09, 2015,16:55:42 »

michael first · « **Reply #6 on:** October 09, 2015,17:59:38 »

hi, what about the t-con board?

EVILMRB · « **Reply #7 on:** October 09, 2015,18:32:46 »

Would still get audio If T-con was faulty.

old tvman · « **Reply #8 on:** October 10, 2015,07:45:24 »

check smd fuse f1 for open circuit on lvds/tcon board.

Turnip · « **Reply #9 on:** October 10, 2015,12:37:38 »

Hi Evilmrb,

No sound might indicate the set isn't tuned to anything in particular. Maybe a Scart input will enable sound, if there is any.

It's a thought that if the T-con pops, sound usually continues if the backlight does, as P/S hasn't cut to S/by.

The main board problem would be the other option if still no sound, and if 3 flashes represents error 3 as Jordan suggested, it's looking that way.

Best of luck - Chris.

EVILMRB · « **Reply #10 on:** October 18, 2015,14:31:34 »

Thank you to all I have now bought a replacement main board for £15 of Ebay,and all is now working.

Mulja tv repair portal · « **Reply #10 on:** October 18, 2015,14:31:34 »

Mulja tv repair portal

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